Glass forming ability and crystallization of Zr-Cu-Ag-Al-Be bulk metallic glasses

► We develop a metallic glassy system with a critical size of about 35 mm. ► We examine high glass forming ability of this alloy system. ► The high glass forming ability is mainly due to the decrease of the melting point and liquidus temperature. ► Suppression of the formation of crystalline phases occur during solidification from liquid state. ► Crystallization of the alloy system is examined and the correlation of the structural difference with GFA is discussed.